ABSTRACT We know JPEG is faster than Wavelet transform algorithm, but
its fidelity is poorer than Wavelet's. As an international standard,
JPEG/MPEG is widely applied in multimedia fields. In recent years,
several new image codings based on WT have been presented, such as
EZW, HARC, SPIHT et al., these schemes can get better fidelity, but
very slow. If there is a method to combine their benefits, we can get
better fidelity and faster speed. HEP algorithm is doing so. HEP is
based on DCT and WT coding scheme, it is faster than WT coding and
better fidelity than JPEG's. The following results are based on HEP
algorithm.